Omega dataset - P14

Hello "Early Bird" Mark,

Thanks for the heads up on this.

Because of a different problem I'm experiencing and want to see if it is in here also, I'm looking at that data. Just the Luminance for now.  However, I've only noticed relatively few bad subs out of the many luminance there are.

I'm planning to use 82 out of 93 luminance, so now I'm wondering if I've got the right set of data. Job 2143.

The problem I've experienced elsewhere with pier 14 jobs, is likely down to using out of date flats. The ones I've been using are from either September or October last year! Would you mind letting me know how recent the ones you are using are, before I run a calibration on the data.

CS and cheers, 

Ray 

Ray

Thanks for the reply!

Yes - that is the one.  I use PixInsight.  The first thing I do is to use Blink process which does an auto stretch to examine all the data - removing subs that are not useable.  For the most part, that is hardly ever an issue - mostly major satelite issues and the like.  So - given your reply - I checked again.  It seems that Blink is not applying a standard stretch to all subs.  I selected all subs in blink and pressed the stretch button twice (first press killed any auto stretch, second applied it to all pictures) an everyhing now seems fine.  

So - user error - sorry Roboscopes - should have known it was me :-0

Regards

Mark

Ray

To answer your ither question , I am using P14 Oct22 flats.  Integrated LRG and B images (no other processing) still show artefacts (dust bunnies) - but these will disappear mostly with processing...

All subs have the same bunny to the bottom left, the L is the worst one...

Regards

Mark

Ray

Here is the stretched L basic integration referred to in the prvious post...

Mark, 

You're a star. :)

I've been plagued with exactly the issue you show on that M64 image on several jobs which  I've only recently got round to processing. That circular shadow may have occurred as a result of their attempts to flatten the camera sensor. It's in the same place on each stack. I get the same result as you on my M64 image, so it looks like it's not something I've done for once. Flats are not going to fix that problem I feel. 

Processing it out is possible, but not desirable. Fingers crossed this will be a thing of the past with that new Epsilon 130.

Thanks for the assistance you gave, even if accidentally, and I'm glad you've managed to put together an image in the end. 

Kind regards, 

Ray